The original Seiko Speedtimer was one of the world's first automatic chronographs when it debuted in 1969. The modern SSC915 is based on that design but swaps out the automatic movement for a light-powered motor with a six-month power reserve. The looks are retro yet timeless, with three sub-dials across the black sunray dial, a date window at 4:30, LumiBrite hands and markers, and a black and red tachymeter bezel. The stainless steel case measures 41mm across and is fitted with a matching bracelet.